Microsoft Outlook Express/Windows Mail UNC Path memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Microsoft Outlook Express and Windows Mail (Mail Client Software) (the affected version unknown). This issue affects an unknown part of the component UNC Path Handler. The manipulation as part of a Mail leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Windows Mail in Microsoft Windows Vista might allow user-assisted remote attackers to execute certain programs via a link to a (1) local file or (2) UNC share pathname in which there is a directory with the same base name as an executable program at the same level, as demonstrated using C:/windows/system32/winrm (winrm.cmd) and migwiz (migwiz.exe).

The bug was discovered 03/23/2007. The weakness was published 06/12/2007 by kingcope as MS07-034 as confirmed bulletin (Technet). The advisory is shared at The identification of this vulnerability is CVE-2007-1658 since 03/24/2007. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 25487 (MS07-034: Cumulative Security Update for Outlook Express and Windows Mail (929123)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l.

Upgrading eliminates this vulnerability. Applying the patch MS07-034 is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 11837. In this case the pattern Content-Type|3A| text/html is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 9007.

The vulnerability is also documented in the databases at X-Force (33167) and Tenable (25487).







  • end of life

CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 25487
Nessus Name: MS07-034: Cumulative Security Update for Outlook Express and Windows Mail (929123)
Nessus File: 🔍
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OpenVAS ID: 801716
OpenVAS Name: Microsoft Outlook Express/Windows Mail MHTML URI Handler Information Disclosure Vulnerability (929123)
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Threat Intelligenceinfo

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Recommended: Upgrade
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Patch: MS07-034

Snort ID: 11837
Snort Message: SMTP MS Windows Mail UNC navigation remote command execution
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03/23/2007 🔍
03/23/2007 +0 days 🔍
03/24/2007 +1 days 🔍
03/24/2007 +0 days 🔍
03/24/2007 +0 days 🔍
03/26/2007 +2 days 🔍
04/02/2007 +7 days 🔍
04/22/2007 +20 days 🔍
06/12/2007 +50 days 🔍
06/12/2007 +0 days 🔍
06/12/2007 +0 days 🔍
06/18/2007 +6 days 🔍
07/12/2007 +24 days 🔍
03/15/2021 +4995 days 🔍



Advisory: MS07-034
Researcher: kingcope
Status: Confirmed

CVE: CVE-2007-1658 (🔍)

X-Force: 33167 - Microsoft Windows Vista Mail Client code execution, Medium Risk
SecurityTracker: 1017816
Vulnerability Center: 14750 - [MS07-034] Microsoft Windows Vista Mail Client Allows Remote Execution of Certain Programs, Medium
SecurityFocus: 23103 - Microsoft Windows Vista Windows Mail Local File Execution Vulnerability
Secunia: 25639 - Microsoft Outlook Express and Windows Mail Multiple Vulnerabilities, Highly Critical
OSVDB: 34102 - Microsoft Windows Vista Mail Client Crafted Link Arbitrary Program Execution
Vupen: ADV-2007-2154

scip Labs:


Created: 06/18/2007 07:38 PM
Updated: 03/15/2021 02:43 PM
Changes: 06/18/2007 07:38 PM (114), 07/17/2019 10:33 AM (2), 03/15/2021 02:43 PM (3)
Complete: 🔍
Cache ID: 3:34D:40


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